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Context Window Supply MCP server

Which MCP servers are Context Window Supply's own, from the official registry and from asking its own domain, whether they answer, and what they offer. A program checked each of these, nobody copied them from a product page.

read 2026-10-27

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Whose server it is
  • Registry namecom.contextwindowsupply/storeverified in the MCP registry

The registry name sits under contextwindowsupply.com. The registry only lets a publisher use that namespace after proving control of the domain through DNS or HTTP.

When we asked itchecked 2026-10-27
  • Stateanswerschecked 2026-10-27
  • Tools5
  • Server calls itselfcontext-window-supply
  • Server version1.0.1
  • Protocol version2025-06-18

On 2026-10-27 the server answered initialize and tools/list without a sign-in. First answer in 131 ms.

Should an agent connect itNot proven either way yet
  • Whether its tools do the product's job has not been judged yet.
  • Checked on 1 of the 7 days it takes to judge reliability.

Once connected

  • Keep approval on for request_refund: they delete, send or pay without saying so.
  • create_checkout_link change data without a sign-in: anyone with the address can call them.
  • Parameters are untyped or undescribed in 4 of 5 tools: check arguments before calling.

Said by rules from the measurements above. The likely first call is a model's pick from the tool list; read its description before relying on it.

Measured dailydaily checks: 1, the first on 2026-10-27
  • INITE MCP scoreafter a weeka score needs 7 daily checks: 1 so far
  • Answeredmeasuring1 of the 7 daily checks it takes to print a share
  • Median first answer285 ms
  • Space in an agent's context≈ 752 tokensthe definitions of all its tools (5), which an agent carries on every turn
  • Tool definitionsB · 87 of 100
  • Typed results0 of 5 toolsdeclared outputSchema: results come typed, read once
  • Parameters without a description: in 4 of 5

What an agent can do with it

  • not sure · order a printed-to-order tee or hoodie
  • not sure · buy AI-themed gifts for engineers
  • cannot · add developer stickers to a laptop

Each of the product's use cases, put to Jev against this server's tool list: can an agent do it with these tools?

Worth a look

  • Tools that delete, send or pay, marked as not destructive: request_refund
  • Tools that change data, on a server that answers without a sign-in: create_checkout_link

A program checks the server once a day: initialize and tools/list, no model. Tokens are the definitions' length at about four characters a token. The grade averages six checks of every tool's name, description, schema and annotations; it says how well the tools are described, not whether they work. The score weighs what was measured and nothing else: answering (25%), doing the product's job (25%), definitions (20%), context (10%), use (10%) and how readily a client connects (10%). A part that was not measured is left out, and a hidden instruction caps the score at 40. The state of vendors' MCP servers: method and numbers →

Tools it offers5 tools · read 2026-10-27
  • search_products

    Search Context Window Supply merch (tees, hoodies, stickers for AI builders). Read-only.

  • get_product

    Get one product with sizes, colors and price. Read-only.

  • get_shipping_quote

    Subtotal, shipping and total for US delivery. Read-only. Rates per item, first/each extra: tee $4.95/$2.25, hoodie $8.95/$2.5, sticker sheet $3.95/$1.95.

  • create_checkout_link

    Checkout is live. Creates a Stripe checkout link for the order that a person opens and pays on Stripe. This tool charges nothing by itself. US shipping only. Never send card details to this server.

  • request_refund

    Files a refund request for a past order. It only files a request: a person reviews it and replies by email. It never refunds anything by itself and never takes card details, so never send card numbers. Needs the order email, the Stripe…

How to connect

Add the server to your MCP client config. Claude Desktop, Cursor and most other clients read this shape:

{
  "mcpServers": {
    "store": {
      "type": "http",
      "url": "https://contextwindowsupply.com/mcp"
    }
  }
}

Add it

Claude Code, in a terminal

claude mcp add --transport http contextwindowsupply https://contextwindowsupply.com/mcp

Add to CursorAdd to VS Code

claude.ai, ChatGPT and other clients: add https://contextwindowsupply.com/mcp as a custom connector in the settings.

OpenAPI spec

4 paths, read 2026-10-27. Open the spec ↗

Each line is something a program found when it went looking: the registry entry, the server's own answer, a spec that parses. A missing line means we did not find it, not that it does not exist.